P0A93 and 94

Dear all,

My car is being a terror.
Pulled off from the lights to the left today, not hard, and just lost power. It drives in limp mode via the engine only and the P0A93 and P0A94 are what shows up. I believe the 93 ones refers to the coolant pump of the inverter, and the 94 one refers to the inverters in general.

Other than getting my Mini VCI thing to work (no driver for it as the cd is scratched, could do with a working link to get it set up properly) to connect to Techstream to read the subcodes.

The code, didn't clear and it doesn't clear by disconnecting the battery. I haven't checked it since it's cooled down (assuming it was a heat issue as is suggested).

The inverter reservoir is full and has clean pink coolant. It doesn't leak because the level never changes. I can't say if the inverter coolant pump is broken, but the code seems to suggest this. But all of a sudden? Very bizarre.

Could anyone suggest what the most likely issue is here? Are there any specific things I can check?

Thanks in advance.

 

Would that replacement be applicable in the UK too?

 

Its ok. I bet it won't be applicable, I can hope though can't I. If it is, I'll be down there like a shot.

Where would I even begin to search for that info?

 

i'll have a thorough google first, thanks again for the info. Now go to get TechStream working.

 

So i got TechStream working.

The inf codes for the P0A94 are 553 and 557.

The P0A93 stayed cleared up and hasn't returned, so it might have been a red herring. I did top up the inverter coolant to the Full mark. And I managed to run the inverter coolant pump, so I know that works.

Now the car does still rattle under a charging load but generally it was better. I think I was barking up the wrong tree lately.

The car DOES drive albeit with zero relation to the hybrid system (but I MG2 is spinning) and it does seem to want to load up if I'm not too heavy on the throttle. But it'a definately a limp mode.

While attempting to clear the code, the engine briefly tries to reintroduce the hybrid system (presumably to charge the battery because it's on 2 bars).,but it instantly fails and brings the fault back up.

Even without trying to clear the fault code, it's 'like' it's trying to get back to normal but isn't.

How likely is this to be a catastrophic mechanical failure of Torque Damper Plate between the engine and gearbox?

Or is is much more lilely to be an electrical issue? I can do any of the checks suggested in the repair manual.

God, I hope MG1 isn"t broken.

Can anyone offer any futher insights based on the above?

As always thanks.

 

So am I safe to assume there's no mechanical failure then?

And one can assume it could be a blown component in the inverter with converter housing.

Thanks ChapmanF

 

I've been on the online paid Toyota Technical Repair manual section of that part including the -553 and -557 parts. And they seem to be going through the same checks.

I can go through all the checks and then identify the issue. I'll even swap the inverter if I need to.

What irritates me more than anything is the weather. I have a drive, but no garage. Very very irritating indeed! Bring on the summer. Sick and tired of the British weather.

 

I would. I'd even get a free inverter replacement.

 

Quick update:
Second hand eBay Inverter labelled 'G9200-47210' (with big letter K in top right corner of the same sticker, whatever that means) as opposed to my original 'G9200-47180' (with letter A) got my car back on the road.

So the original fault has indeed gone and has stayed away so far (only one journey to work so far). I must have been the IBGT's for the DC/DC Boost converter. But now another fault popped up which isn't stopping the Hybrid System, but the 'Eco', 'PWR' and 'EV' buttons don't work, but it's not in Limp mode like before anyway...

When I connected everything back up, I heard a little electrical pop somewhere, I thought nothing of it and assumed something to do with having the traction disconnected, but the message 'Check Hybrid System' showed up on the display my heard sank, so I read the fault and it's a P0A84 (I think that was it or similar, either way, the meaning is 'Hybrid Battery Coolant Fan Low' (not working), I guess 'open circuit'?

I'm going to be hopeful and assume a fuse blew when I powered my car back up (because of the pop)? So does anyone know from the top of their head which fuse might have blown? I'll check myself later, just not this moment as I'm in work. But yea, I'm back on the road. Yay!

Funny thing about this replacement inverter was the coolant pipes on it were slightly angled away towards the corners, they seemed solid and still part of the system, and coolant isn't leaking so far. I guess it was a design change.